Metal-screw machine



(No Model.) Sheets-Sheet 1.

E. ROTHLISBBRGER.

METAL SCREW MACHINE.

No. 434,204. Patented Aug. 12, 1890.

(No Model.) 7 ShgetsS heet 3.

' E. ROTHLISBERGER.

METAL SCREW MACHINE.

No. 434,204.- Patented Aug. 12, 1890.

ms nomus Penna 00., mwo-Lmm, \nsmucmu, n. c.

(No Model.) TSheets-Sheet 4.

I E. ROTHLISBERGER.

METAL SCREW MACHINE Patented Aug-12', 1890.

(No Model.)

7 Sheets-Sheet 5.

E. ROTHLISBERGER. METAL SCREW MACHINE.

No. 434,204. Patented Aug. 12, 1890..

(No Model.) 7 Sheets-Sheet 6.

E. ROTHL'ISBERGER. METAL scmaw MACHINE.

No. 434,204. Patented Aug. 12, 1890.

THE Noam rz'ranscm. Panic-mum, wnaumu'rcm, 0.1:.

(No Model.) 7 Sheets-Sheet 7.

E. ROTHLISBERGER.- METAL SCREW MACHINE. I

Patented Aug. 12, 1890.

Z- i f I V a I I A i i (/3) VIEW/4- m: new: PETERS 00., movwu'mo.wAmwarou B c UNITED STATES PATENT OFFICE.

ERNESTE ROTHLISBERGER, OF LIMA, OHIO.

METAL-SCREW MACHINE.

SPECIFICATION forming part of Letters Patent No. 434,204, dated August12, 1890.

Application filed January 25, 1890. Serial No. 338,109; (No model.)

To all whom it may concern.-

Be it known that I, ERNESTE ROTHLIS- BERGER, a citizen of theUnitedStates,residing at Lima, in the county of Allen and State of Ohio, haveinvented certain new and useful Improvements in Metal-Screw Machines;and I do declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same, referencebeinghadto the accompanyingdrawings, and to the letters of reference markedthereon, which form a part of this specification.

This invention relates to improvements in machines for making bolts, theobject being to provide means whereby the bolts may be turned downcylindrical, threaded, and cut from a straight rod rectangular incross-section; and it consists in the construction and novel combinationof parts hereinafter described, illustrated in the accompanyingdrawings, and pointed out in the claims hereto appended.

In the accompanying drawings, in which similar letters of referencedesignate corresponding parts, Figure 1 represents a side elevation of amachine embodying the invention. Fig. 2 represents a central verticallongitudinal section thereof. Fig. 3 represents a vertical transversesectional view on the line a: aof Fig. 1, but with some parts slightlyout of said line to show the interior arrangement' thereof. Fig. 4represents a vertical transverse section on the line y yof Fig. 1, toshow the connecting-gearing. Fig. 5 repre-' sents a longitudinal sectionof the worm,-

' wheel, turret, turret-slide, and connected parts, on the line z z ofFig. 6. Fig. 6 represents a detail plan view to further illustrate saidparts. Fig. 7 represents a detail longitudinal sectionaL view on theline 2 z of Fig.

6, of the mechanism to hold and release the turret. Figs. 8, 9,10, and11 are detailviews, some sectional, showing the construction andoperation of the clutch for the bolt-rod. Figs. 12 and 13 representsimilar views of the feedclutch for said rod. Fig. 14 is an end view ofg the roughing and threading die holder. Fig. 15 is a side View of saidholder. Fig. 16 is a plan view of the same. Fig. 17 is an axapart. Fig.18 is a similar section with the dies closed. Figs. 19 and 20 are detailviews of the holder and dies. Fig. 21 is a planview of the worm-wheelwith cams attached. Fig. 22 is a section on the line 11 o of Fig. 21.

Referring to the drawings by letter, A designates the main frame of themachine, supported upon suitable legs at its corners and having ahorizontal bed a, which supports the portions of the main frame aboveitself and the bed-block on which the turret-slide,hereinafterdescribed, moves. a a are standards rising from said bed a, and havingsimilar bearings a a at their upper ends.

a is a supporting-arm projecting horizontally forward from the frontstandard a and a is a similar arm projecting similarly forward and thendescending to unite with the arm a j B designates a sleeve turning inthe front bearing a and b is a drive-pulley secured to said sleeve justto the inner or rear side of said sleeve. The sleeve carries on itsopposite or outer end a gear-wheel 1), preferably integral therewith.

C is a long hollow spindle or shaft with its front portion inserted inthe sleeve B, the adjacent end of which is flush with the outer surfaceof its middle portion, as shown in Fig. 2.

c is a pulley about equal in size to the drivepulley b, turning looselyon the spindle O, the circumferential shoulders c c of the spindle beingadjacent to the hub of the pulleys. The said pulleys may be driven bybelts from any convenient motor and rotate in opposite directions,having suitable teeth b and 0 respectively, on the facing ends of theirhubs, that engage corresponding teeth on a clutch thirnble or sleevemounted on the middle portion of the spindle O, and hereinafter morefully described.

D is a horizontal shaft, Figs. 1 and 3, mounted in suitable bearingssecured to the main frame at one side thereof and passing through anopening in the lower end of a bearing-bar cl, secured by bolts orotherwise to the front portion of the main frame. Upon the front end ofthe shaft D, to the outer side of the bearing-bar, is secured agear-Wheel d, that meshes with the lowest of a series of gearial sectionof said holder with the dies opened on short shafts, each having abearing in the bar (1, at a suitable point therein. The said gearsintermesh from above downward. The highest wheel (6 meshes with thegear-wheel b on the sleeve B, and the gear-wheels (Z d (l d diminishsuitably in diameter upward, to give the lowest wheel (1 the proper andtie sired rate of speed.

The shaft D has upon it between the bear ings, secured to the main frameat the side of the bed-block for the turret-slide, a worm e, whichmeshes with a large horizontal wormwheel E, mounted on the upper end ofa vert-ical shaft e, that turns in bearings made on or secured to themain frame. Upon the shaft 6 is a bevel-gear c meshing with a similargear f upon a horizontal shaft F, that turns in bearings depending fromthe main frame. The said shaft F operates the bolt-rod-grippingmechanism, the feeding mechanism, the reversing mechanism, and the boltthreading and cutting mechanism, and is itself rotated from thedrive-pulley Z2 and sleeve B by means of the connective gearing-shafts,worm-wheel, and worm hereinbefore described.

The bolt-rod-grippin g mechanism is construeted as follows:

G is a hollow supporting-shaft surrounded by the spindle (J, and withthe bolt-rod X passing axially through it from its feed end, the rodsbeing suitably supported by a collar or perforated block entering saidend. The outer or feed end of the shaft G is enlarged or provided with acylindrical head g, having a circumferential groove in which is seated aring g, suitably divided and connected to and within the arms of thebifurcated upper end of a lever by pivotal screws. (See Fig. 3.) Thesaid lever has a longitudinal slot aboutmidway of its length, throughwhich it is pivoted upon the side of the arm a of the main frame, and atits lower end is pivoted between the arms of a bifurcated blockonanti-friction rollers that bear against a cam-edged flange of acam-disk g", mounted on the shaft F and turning therewith. Theanti-friction roller and lower arm of the lever are drawn into theconcavity of said cam-roller by a spring g that connects said arm andthe main frame.

Upon the inner or discharge end of the hollow spindle C is screwed acylindrical head II, having a hollow interior, through which thebo1t-rod X passes, and in transverse opposite slots h in said head movethe grippingjaws'h, that hold the red when it is being out, the saidslots h and jaws 7t being rabbeted on corresponding edges to keep thelatter in place, as seen in Fig. 11. The jaws h have V-shaped notches intheir ends to grip the boltrod, and are provided with openings 7L2 forthe insertion of the heads of the gripping-levers 7L3, that lieinlongitudinal recesses h in-the head II and are pivoted on the bolts orpivotal rods 71/5 therein. The arms ]L6 of said levers are connected byshort links it with the inner end of the hollow shaft H, the said linkspassing through suitable openings in the hollow spindle 0. Thus when theshaft G is drawn outward by the lever and cam the ends of said arms hare drawn together and the jaws moved outward, releasing the rod, sothat the latter can be fed into the machine. When the shaft G is movedinward by the lever, the action is reversed, and the jawshold thebolt-rod while it is being cut and formed.

The following is a description of the construction of thebolt-rod-feeding mechanism.

I is a slotted lever similar to the lever and similarly pivoted to thearm a of the main frame, and t is an anti-friction roller mounted on thelower end of the lever I and engaging against the cam-tlange of acam-disk t", secured upon the shaft F. The upperend of the lever I isbifurcated and connected by pivotal pins or screws to a suitable ring iseated in a circumferential groove in the cylindrical enlargement of aclutch-sleeve 71, having an inwardly-lookingconical part i adjoiningsaid enlargement.

J is a slide or carriage frame moving over the arm a of the main frameupon flanges atits upper edges or plates bolted thereto and havingdepending arms, in the outer or front one of which the clutch-sleeve t'"has a bearing, while in the inner depending arm the central boss 7' of acylindrical block 7" has a bearing. 7' j are jaws sliding in transversediametrieally-opposite recesses in the block j, having V-shaped notchesin their ends to grip the bolt-rod and provided with openings j toreceive the heads of the short gripping-levers j, that lie inlongitudinal recesses in the block 7". Said levers 7' are pivoted uponthe pins j and have their arms bent inward to rest upon the conicalparts t' of the elutehsleeve, so that when the lever I moves the saidsleeve inward the said conical part will move said arms apart, and willconsequently close the jaws on the bolt-rod. It will also move thebolt-rod, carriage-frame, and cylindrical block inward, or in thedirection of feed, and to cause said frame and block to cease motionimmediately at the end of each stroke of the clutch-sleeve t a spring 3'is secured centrally to the carriage-frame by a bolt or otherwise, andhas on its ends little blocks, which pass through openings in the frameand bear against the under surface of the arm a of the main frame, whichgives the necessary friction to accomplish the desired result.

At openings of the clutch-sleeve, cylindrical clutch-block, and otherparts, the bolt-rod is supported in proper line by collars or perfoat edblocks, as shown. A coiled or other springj connecting the lower arm ofthe lever land the main frame, returns the clutchsleeve after beingmoved inward by said lever. The parts are so arranged that the feedmechanism and gripping mechanism act alternately, one being at rest whenthe other is in action. By this means the bolt-rod can be fed up,released by the feed mechanism, and then held by the gripping mechanismtill the bolt is cut and made.

IIO

acting cams k The mechanism to reduce the rod and thread the bolt isconstructed as follows:

R is a tool-holder or cylindrical turret to hold the reducing andthread-cutting dies, of which there are preferably six in number, threebeing roughing-tools and three threading-tools, a fuller description ofwhich is hereinafter given. with equidistant recesses or openings forthe reception of the respective tools, Fig. 5, and is attached by acentral vertical stem is to the turret-slide 7a, which is preferablyrectangular and reciprocates upon its supporting-bed k in suitable waysor guides made in the up per face of the latter. The worm-wheel E has inits upper face the annular recesses 10 preferably three in number,concentric with its center, which recesses are T-shaped in construction.To the worm -Wheel are attached by bolts or pins, the heads of whichrest in said annular recesses, the series of pairs of curved edged cams,the members of each pair being designated 10 k respectively. The numberof pairs of said cams is equal to that of the tools, both-roughingandthreading, attached to the turret-in this instance six. Theoperating-edges of said cams are ,more or less concave, and their pointsstand nearly out to the rim of the worm-wheel, from which the camsincline inward, the smaller reversing-cams k in the opposite directionto and at a steeper inclination than the direct- The points of thereversingcams also are slightly rounded on their operating-edges, asshown.

70 is an anti-friction roller mounted on the lower. end of a stud is",depending from the turret-slide in the central line thereof near itsouter or rear end and secured to said slide by a threaded stem and bolt,as shown. The said friction-roller is engaged by the point-of one of thedirect-acting cams 7c and moved inward in a straight line by the concaveoperatingedge thereof as the worm-wheel rotates till it reaches the heelof said cam, operating when it engages against the operating-edge of thecorresponding oppositelyinclined cam 70, which moves it as far outwardagain. Of course the reciprocation of said rollers by means of the stem70 causes the turret-slide to reciprocate, and the reciprocation of theturret-frame causes the roughing and threading tools attached to theturret to move up to and from their work. The stem k reciprocates in asuitable slot in the turret-slide support or bed k (See Fig. 5.) Ofcourse the turret must turn the sixth part of a rotation after each toolhas operated to bring the succeeding tool in alignment to. operate, andwhen said tool is in operation the position of the turret must be fixed.To accomplish the rotation, a wheel L, Figs. 5 and 6, having sixequidistant hook-points, is secured to the lower end of the turret-stemk in a large recess Z in the turret-slide, and a lever Z, having anupturned point 1*, with its edge adjoining the upper edge of the shankinclined to slip over The said turret is provided.

an obstruction, is pivoted in a recess 1 in the slide-support,communicating with the recess in the turret-slide, a spring Z beingsecured in an outer or rearward extension of the recess Z and bearingdownward upon the heel of the hook-lever Z to keep the latter horizontaland with its point erect. Vhen the direct-acting cams move theturret-slide inward, the point Z of the lever 1 will strike against oneof the hook-teeth of the wheel Z and turn said wheel oue-sixth of arotation. The turret then becomes locked by means hereinafter described,and the slide being returned outward the inclined edge of the point Zwill ride under the succeeding tooth and will be brought into positionagain by the spring Z The following is a means to lock the turret whenin position. (See Figs. 6 and 7 Z Z are six equidistant verticalrecesses in the base of the turret, any one of which may be turned toregister with an opening passing down into the long recess Z in theturretslide. In saidrecess is pivoted a doublearmed lever Z having ahead on one end that enters and holds in a notch in the side of a pin Zthat stands up and down in the recess 1", with its point ready to passthrough the opening therefrom into one of the recesses 1 in the turret.The opposite end of said lever has its end inclined inward and downwardand is pressed down upon by a spring Z secured in the recess 1.

Z is a cam having an edge 1 inclined downward and inward and pivoted ina slot in the slide-support below the recess Z in the turretslide.\rVhen the turret andslide move far enough outward or rearward, theinclined edge 1 impinges on the outer end of the lever Z and therebydepresses the pin Z so that the turret becomes unlocked from the slideand can be rotated by the described means. The unlocking happens just asthe hooked lever Z and wheel are about to rotate the turret, and aftersaid rotation the turret and slide are moved in the opposite directionand the spring Z causes the pin to again lock the turret.

The boltrod Xis rotated by a sleeve-spindle and hollow shaft, throughwhich it passes, and the tools attached to the turret do not rotate, butare merely moved up to and from their work by the mechanism described.Any style of die for said tools may be used; but the modificationhereinafter described is that preferred. To use said dies the tool ordieholder must be made to receive said dies, and therefore must havea'particular construction. M is one of said die-holders, having ahollow, stern m, adapted to bereceived into one of the recesses madetherefor in the turret. Outward from the said stem isthe enlargedcylindric portion m,having three equidistant longitudinal slots m andoutward from said cylindrical portion are three similar equidistantradially-diverging blocks m N is a cam-sleet e sliding on the part at ofthe die-holder and having at its end nearest thereto a circumferentialcam-flange, having the outer inclined cam side a.

n is a rod standing axially in the die-holder and threaded therein, uponwhich threaded part are the adj Listing-nuts a n the latter of which isconnected with the sleeve N by the three rods 01' screws n, that passthrough the slots m Thus the sleeve N and bolt 'or rod 01' must movetogether, being connected by said screws. The nut n has a threaded bossthat screws into a corresponding recess in the nut a and 0 causes thenuts to lock together.

0 O are screw-cutting dies having rabbeted edges to slide ineorrespondin g radial recesses 0 0 made for them in the outer portion mof a die-holder M. The inner ends of each of said dies, which are threein number in each holder, has a proper concave cutting'edge, while itsouter end is providedwith a longitudinal open recess 0' to receive theend of a lever 0 that lies in a longitudinal recess in the correspondingblock m and has a rounded inward enlargement 0 that-is pivoted to saidblock an inward from the die therein on a transverse bolt, as shown.

0 is a bar or arm having on one end a rounded head that fits in asimilar socket o in the inner edge of the lever 0 its other end having ahead 0, the end edge 0 of which inclines in such a direction as to restupon the inclined side a of the flange of the camsleeve N.

o 0 are adj listing-screws that pass threaded openings in the inner endsof the levers 0 and bear upon the corresponding bars 0 As the outer endsof said levers press inward on the threading-dies, it is evident thatany wear of said dies can be taken up by turning the crews 0 inward.

o 0" are coiled springs seated in recesses 0 in the die-holder andpressing outward against projections 0 on the inner surfaces of thedies, to force the latter outward when they have been relieved from thepressure of the levers 0 o is an anti-friction roller mounted on a pindepending from the cam-sleeve N and bearing against the side of a curvedcam 0 secured to theturret-slide, but not concentric with the turret,the anti-friction roller engaging the surface of the cam outward fromthe turret at the end of the cam which is nearer the latter, so that thesaid roller and consequently the sleeve N will be drawn slightly awayfrom the turret and the inclined edges 0 of the arms or bars 0 until theadjacent ends of the said bars rest upon the flange of the sleeve N andthe levers 0 drive the threading'dies inward on the bolt-rod and intoposition to cut.

\Vhen the turret has been turned into position and the dies have roughedout and threaded the bolt, the bars or arms a are thrown off from theflange of the cam-sleeve N by the contact of the end of the bolt justformed and the rod 01, the latter being driven back thereby and carryingwith it the sleeve N. The bolt is then in condition to be cut from thebolt-rod by the mechanism hereinbelow described.

P P, Fig. 3, are cutter tools or knives mounted by suitable means upontool-holders p p, and held thereto by set-screws, as shown. The saidposts are attached to and held upon carriages or slides 19' 1), movingtransversely upon ways made upon suitable portions of the main frameabove the slots 11 therein.

19 19 are similar double-armed levers piv oted on the main frame atproper points and with the heads on their upper ends entering sockets inthe lower surfaces of the blocks #19 which are held in place within therecesses in the under surfaces of the carriages by the adj usting'screws19 19 of ordinary construction.

p 1) are anti-friction rollers attached to the lower ends of the leversp 19 which rollers bear against the cams 11 19 secured upon the shaft Fand turning therewith. The mo tion of the knives inward when the camsand levers move the carriages inward severs the bolt from the bolt-rod.This takes place immediately after the roughing and threading mechanismhave been drawn from the bolt.

17 13 are coiled springs connecting the levers with the main frame andreturning the knives outward after the bolt is severed.

When no means are provided for separating or opening apart thethread-cutting dies after cutting the threads, the said dies could notbe withdrawn without stripping the threads. To prevent this whenordinary threading-dies are used, the following mechanism is attached:

Q is a clutch thimble or sleeve splined on the spindle C, between thepulleys l) and c, and provided with teeth (1 g at its opposite ends,that respectively mesh with the teeth 11 c on the adjacent ends of thehubs of said pulleys, one pulley being in gear with said thimble whenthe other is out of gear there with and the pulleys being rotated inopposite directions.

(1 is a suitably-divided ring seated in a circumferential groove in thethimble Q, and R is a double-armed lever pivoted to the main frame at aproper point and with its upper end bifurcated andstraddling said ring,to which the arms of the bifurcation are connected by pivotal pins orscrews 0'. Attached to the lower end of said lever is a bifurcatedblock, in which is mounted an anti-friction roller 0', that bears uponthe cam-edge of the circumferential flange of a cam-disk S, mounted onthe shaft F.

s is a spring connecting the lower arm of the lever B with the mainframe. \Vhen the anti-friction roller 7' is on the uncut or straightedge of the flange of the cam-disk S, the lever holds the clutch-thimblecoupled to the pulley l), and the spindle O rotates in the properdirection for the roughing and thread-cutting dies to operate on thebolt-rod; but when said roller descends into the hollow of thecamfiange, the springs un'couples the clutch-thimble from the pulley 0,thereby reversing the motion of the spindle O, causing the bolt-rod toturn in the direction in which the threading-dies can disengagethemselves therefrom without stripping the threads.

Thus by the described mechanism the square bolt-rod is fed by thefeed-jaws into the hollow supporting-shaft at regular intervals, andwhen the said jaws close to act, the

gripping-jaws hold the bolt-rod while the bolt is roughed and threadedand severed from the rod.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. In a bolt-making machine, the combination of the carriage-framesliding on an arm of the main frame, the spring secured centrally tosaid carriage-frame and having blocks or pins on its ends that passthrough suitable openings and bearon the main frame, the camsleevehaving a bearingin the outer depend ing arm of the carriage-frame andprovided with a conical cam-surface, the cylindrical block having a bossjournaled in a bearing in the inner depending arm of the carriageframe,the feed-jaws sliding in recesses in said block, the levers pivoted inrecesses in the block with their outer ends resting on the conicalcam-surface of the cam-sleeve and their heads in openings in thefeed-jaws, and mechanism, substantially as described, whereby the sleevecan be slid sufficiently far in between the levers to cause the jaws togrip the bolt-bar and thereby cause the carriageframe, sleeve, and blockto move together in the direction of feeding, substantially asspecified.

2. The combination, with the carriageframe, the spring attached theretoand provided with end blocks to provide friction on the main frame, thecam-sleeve and block having bearings in the depending arms of thecarriage-frame, the sliding feed-jaws and the pivoted levers with theirheads in openings in said jaws, and their outer ends resting on theconical part of the cam-sleeve, of the slotted lever pivoted to the mainframe and having its upper end attached to a ring in a circumferentialflange of the cam-sleeve, and a cam secured to a longitudinal shaftrotated by the drive-pulley by means of connecting gearing and operatingupon the lower end of the lever to move the cam-sleeve outward againstthe action of a spring which moves inward, substantially as specified.

3. In a bolt-making machine, the combination of the hollowsupportingshaft sliding slightly in'and out of the rotary spindle, thehollow cylindrical head secured upon the inner end of said spindle, thegripping-jaws sliding in transverse recesses in said head, the leverspivoted in recesses in said head with their heads in openings in saidjaws, and the links connecting the ends of said levers with the adjacentend of the hollow shaft, substantially as specified.

i. The combination, with the hollow supporting shaft, the rotaryspindle, thehollow cylindrical head, the gripping-jaws,the pivotedlevers, in the head, and the links connecting saidlevers and theadjacent end 'of the hollow shaft, of the slotted lever pivoted to themain frame and connected at its upper end with a ring in acircumferential groove in the hollow shaft, the anti-friction roller onthe lower end of said lever, the cam bearing against said roller, andthe'spring connecting the lever and main frame and acting against thecam, substantially as specified. 7

5. In aboltmaking machine, the combination of the feed mechanismcomprising the sliding carriage-frame, friction-spring, camsleeve,cylindrical block, feed-jaws, and the gripping mechanism comprising thehollow supporting-shaft, rotary spindle, cylindrical head,gripping-jaws, levers operating said jaws, and links connecting saidlevers to the hollow shaft of the levers, cams and springs constructedsubstantially as described, and causing said mechanisms to actalternately, one mechanism being at rest while the other is inoperation, substantially as specified.

6. The combination of the sleeve carrying the driving-pulley, thegear-wheel on said sleeve, the longitudinal shaft mounted in bearingssecured to the main frame, the gearwheel on the front end of said shaft,the gearing connecting said gear-wheel and that on 'ing, reversing,gripping, and feeding mechanisms, and the gearing connecting said shaftand the worm-wheel shaft, substantially as specified.

8. The combination of the turret, the turret-slide, the worm-wheelhaving annular concentric recesses in its upper face, the direct actingand reversing cams attached to said worm-wheel by means of said recesses'and bolts or screws, the stud depending from the turret slide, and theanti-friction roller on the end of said stud to engage the said cams,substantially as specified.

9. The combination, with the turret, the vertical central turret-stern,the toothed wheel on the lower end of said turret-stem, theturret-slide, and the stud depending from the turret-slide through aslot in the slide-support and having an anti-friction roller on itslower end, of the worm-wheel, the cams at- 'tached thereto, the hookedlever in a recess in the turret-slide support and projecting into arecess in said slide, and the spring pressing on the heel of said leverto keep the point thereof erect, substantially as specified.

10. The combination, with the turret having recesses in its base, theturret-slide having a recess com munieating with any one of said lockingrecesses through an opening, the stud depending from the turretslidewith an anti-friction roller 011 its end, the worm-wheel and camsattached thereto to operate upon said roller and stud, of the pin in therecess in the slide, the doublearmed lever pivoted in said recess with ahead on one fitted in a notch in said pin, the spring to press down theopposite arm of the lever, and the cam pivoted in a slot in theturret-slide support to raise said end when the slide moves inward andthereby draw down the pin unlocking the turret, substantially asspecified.

11. The combination,with the stud depend in g from the turret-slide, thewor1n-wheel and the cams thereon, of the toothed wheel on theturret-stem, the hooked lever, the spring to depress the heel of saidlever, the lockingpin, the spring bearing on said lever, and the cam toact on the lever and depress the locking-pin to unlock the turret justbefore the hooked lever has operated upon the toothed wheel,substantially as specified.

12. The combination, with the knives, the tool parts to which saidknives are attached, the carriages bearing said parts, and theadjustable recessed blocks below and within said carriages, of thedouble-armed pivoted levers with their heads in the recesses in saidblocks, the cams on the shaft F to throw said heads inward,and thesprings to reverse the motion of the levers, substantially as specified.

13. The combination, with the two pulleys rotating in oppositedirections and having clutch-teeth on the facing ends of their hubs, ot'the clutchthimble splined on the rotary spindle and having clutch-teethon its respective ends to engage said clutch-teeth, the ring in acircumferential groove in said thimble, the double-arm pivoted leverhaving its upper end attached to said ring, the cam on the shaft Facting on the lower ends of said lever, and the spring acting on a leverin a direction opposite to that of the cam, substantially as specified.

14. The combination, with the turret and the curved cam on theturret-slide adjacent to but not concentric with the turret, of thedie-holder attached to the turret and having longitudinal slots in itscentral portion, the cam-sleeve sliding upon said portion and providedwith an inclined circumferential camsurface, the rod in the hollow stemof the holder connected by nuts and screws or pins that pass through thesaid longitudinal slots in the holder, with the cam-sleeve, the roughingand threading dies, the levers pivoted in recesses in the holder andbearing on said dies, the bars or arms connected to said levers withtheir heads resting on the cam-sleeve in such a manner that the inclinedends of said heads can ride up on the inclined surface of the cam-sleeveflange, and the pin or stud depending from the cam-sleeve and preferablyprovided with an anti-friction roller to bear against the curved cam onthe turret-slide and force the cam-sleeve inward with relation to thesaid arms or bars, and thereby tilt the levers and drive the diesinward,substantially as specified.

15. The combination, with the turret and curved cam on the turret-slidenot concentric with the turret, of the die-holder, the camsleeve slidingthereon and provided with a circumferential inclined cam-surface, therod in the stem of the holder connected by jamnuts and screws or pinspassing through slots in the holder with the cam-sleeve, the diessliding in recesses in the holder, the pivoted levers bearing on saiddies, the bars or arms connected to the said levers and having headsformed to ride up the inclined surfaeeof the canrsleeve, the pin or studdepending from said sleeve and having an an ti-frietion roller to engagethe curved cam on the turret-slide, and the coiled springs in recessesin the holder bearing against lugs or projections on the dies outwardwhen released by the levers, substantially as specified.

16. The combination, with the tool-holder, of the sliding dies, thecam-sleeve sliding on the holder, the levers pivoted to the holder andbearing on said dies, the arms or bars having at their inner endsrounded heads inserted in sockets in the lovers and at their outer endsheads provided with enter inclined edges to slide upon the inclinedsurface of the cam-sleeve, and the adjustingscrews passing throughthreaded openings in the levers and bearing on the outer heads of thecorresponding bars orarms, substantially as specified.

17. The combination, with the tool-holder having longitudinal slots atproper points, of the cam-sleeve sliding on said holder, and the rod inthehollow stem of the holder connected by jam nuts and screws or pinspassing through said slots to said sleeve, whereby when the end of saidrod strikes the end of the screw just made the sleeve connected to saidrod is carried outward in relation to the bars attached to the loverswhich move the dies inward and the latter are permitted to be pressedoutward by suitable springs, sub stantially as specified.

In testimony whereof I affix my signature in presence of two witnesses.

ERNESTE RO'JIILISBERGER.

Witnesses:

V. L. PARMENTER, WILLIs V. MYERS.

